Not sure if this is working as intended or not. I never played the Tinker in vanilla Sorcerer King but I downloaded Rivals and fired up a campaign using the Tinker. In my first battle I cast vorpal sword and summoned one into the fight. After the battle ended I had gone into my equipment screen and found the weapon was there. I could equip it onto characters in my army or sell it for 2 mana. This was also true for both the vorpal spear and vorpal bow as I tested them later. (although the spear and bow had higher level requirements than 1). Bug or working as intended?